Duplicate printing mechanism for adding-machines.



No. 693,958. Patented Feb. 25, I902. n. E..FELT. r DUPLICATE PRINTING MECHANISM FOR ADDING MACHINES.

(Application filed Aug, 17,, 1899.)

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No; 693,958. Patented Feb. 25, I902.- D. E. FELT.

DUPLIGATE'PRINTING MECHANISM FOR ADDING MACHINES.

(Application glee Au 17; 1899.)

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No. 693,958. Patent ed- Feb. 25, I902.

n. E. FELT. v DUPLICATE PRINTING MECHANISM FOR ADDING MACHINES.

(Application filed Aug.- 17, 1899.)

(No Model.) 4 Sheets-Sheet 3.

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DUPLICATEPRINTING MECHANISM FOR ADDING MACHINES.

(Applicationfiled Aug. 17, 1899.)

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UNITED STATES PATENT OEETQE.

DORR E. FELT, OF CHICAGO, ILLINOIS.

DUPLICATE PRINTING MECHANISM FOR ADDING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 693,958, dated February 25, 1902. Application filed August 17, 1899. Serial No. 727,490. (No model.)

To all whom it may concern.-

Be it known that I, DORR E. FELT, a citizen of the United States, residing in Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Duplicate-Printing Mechanisms for Adding Machines, of which the following is a specification.

This invention is a modification of and in single ribbon, and without the employment of carbon or manifolding paper,'by making the duplicate copy upon thin transparent pa. per and feeding it and the paper for the original upon opposite sides of the ribbon, so both papers were impressed by the same impact of the type or type-hammer, the characters being thus printed in reverse upon the back of the duplicate sheet, but showing through it, so as to be distinctly readable upon the front. I also provided in said patent means for separating the paper strips as they approached the printing-center and for guiding them into position on opposite sides of the ink-ribbon.

In my present invention I still employ a single ink-ribbon; but instead of printing from both sides of the ribbon, as before, I now double the ribbon upon itself in front of the type and print from both courses thereof, one copy from each. In other words, both the ribbon-spools are located at the same side of the machine, and the ribbon is led from one of the spools past the printing-point to and around a roller at the other side of the machine, and thence back and again past the printing-point to the other spool. One of the strips of paper is fed between the two courses of the ribbon and the other outside of them, and proper guides are provided for starting the strips of paper in their proper channels. By these means I am enabled to make both impressions direct instead of one direct and one reverse, as in the patented machine, and thus render unnecessary the use of transparent paper for either of the paper strips. This and other features of my invention are fully set forth below and also illustrated in the accompanying drawings, in which latter- Figure 1 is a plan of that portion of the machine to which my invention relates, showing the ribbon and the type-segments. Fig. 2is a front elevation of the parts shown at Fig. 1. Fig. 3 is a vertical section showing the same partsin position for printing. Figs. 4 and 5 are sections on the lines 4 4 of Fig. 2; and Figs. 6, 7, and 8 are sections on the line 6 6 of Fig. 2, giving different positions of the paper and ink-ribbon guides. Fig. 9 is a detail section on the line 9 9 of Fig. 2. Figs. 10 and 11 are detail perspectives showing the ribbon-guides in different positions. is a view similar to Fig. 9, showing the parts in a different position. Fig. 13 is a'section on the line 13 13 of Fig. 12. Fig. 14 is a detail perspective of one of the parts.

In said drawings, A A represent segments each carrying a series of type and pivoted at A and positioned to bring the proper type to the printing-line by rods A joined to the gooseneck extensions A the latter rigidly connected to the segments, though they are spaced farther apart than the segments, so as to bring them in line with the keys from which they are actuated. The segment shown at Fig. 3 is in the position in which it will I print its upper character.

B is'one of the hammers for impressing the paper and ribbon on the type,=there being one such for each type-segment.

C and C are the paper-feedrolls, acting to feed both strips W Y of the paper to the printing mechanism from supply rolls. (Not shown.)

D D are the ink-ribbon spools, actuated in the customary manner by pinions, some of separate and parallel courses or portions E and E of the ribbon are thus positioned be Fig. 12

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tween the type and hammers, and each of them may be utilized. to print on one of the strips of paper, as will be fully explained hereinafter.

In order to utilize the two parallel courses of the ribbon for printing upon separate strips ofpaper,suitable means are provided for separating the courses of the ribbon, so as to permit the entrance of one of the strips of paper between them. These means consist in part of two parallel fiat spring-plates F and F, arranged across the front of the type-segments and cut out at their centers, as plainly shown at Figs. 2, l0, and 11, so as to expose the ribbon, while their upstanding end wings F act as guides to the ribbon. The plates are preferably secured together along their bottom line, so that both move together, and they are firmly attached at one end to a stationary part of the machine, as seen at F the other end being free to be forced forward by a handlever F mounted on the cross-shaft One of the ribbon coursesthat indicated at-E moves between the wings of the plates F F, and the other course E thereof moves between the back plate F and the stationary abutments F and F arranged one at either side of the type-segments, as seen at Figs. 1 and 2.

The lever F is intended only for momentary use while entering one of the paper strips between the ribbon courses E and E and consequently it is adapted to swing forward when actuated by the operator a limited distance and in so doing by its engagement with the spring-plates or the extension F on one of them to force their free ends forward, and thus widen the space between the ribbon courses and allow the initial end of the paper strip Y to enter between them. This operation will be clearly understood from Figs. 10 and 11, Fig. 10 showing the plates in their normal position, with the ribbon courses together, and Fig. 11 showing them as bent forward, as just described, and as moving the course E away from course F. to form the opening forgaper Y. As soon as strip Y has been entere between the ribbon courses the lever F is released by the operator and returns to its normal position under the power of spring F attached to the guard-plate G, fast on said shaft F and located at the other side of the printing-center. Said plate G and a companion plate G, which, however, is loose upon the shaft F instead of being fast on it, as is'the case with plate G, are located below the springribbon-guide F and in such proximity to the paper-feed rolls as to enable the plates to directthe paper properly with reference to the ribbon. The plate G is controlled by its shaft F and consequently swings forward whenever the lever F is moved forward, as hereinafter set forth, and it also swings in the same direction whenever plate G swings forward by reason of the engagement of pin G carried by shaft F and the projection G carried by said plate. Plate G is actuated in these movements by a hand-lever G, attached to or in one piece with it, and is returned by a spring A pivoted pawl G serves to lock lever G in its forward position, (shown at Fig. 8,) being swung automatically into position behind the lever, so as to prevent its return, by attaching it to the other end of said spring G The lock thus effected is released by lever F when it is next operated, as said lever then encounters the point or projection G on the pawl and turns the latter sufliciently to release lever G The paper strips are both out diagonally at their initial ends, and when two strips are used they should be thus cut in opposite directions, (see Fig. 2,) so that when advanced by the feed-rolls the long side of strip-XV strikes the plate G and the long side of strip Y strikes plate G. These plates are located at opposite sides of the vertical center of the machine, and each is thus adapted to act on the advance portion of one of the strips. lVhen in position for use without duplicating and with one strip of paper, they are both inclined forward, so that the paper will be directed by them to the front or outside of the ribbon guide F; but if it is desired to duplicate, the operator actuates lever F, thereby throwing forward plate G, but leaving plate G in the position of Figs. 6 and 7, and holds said lever against returning while he feeds the paper upward. Plate G will now direct strip \V forward of the ribbon-guide F, and plate G will act upon the advance point of strip Y and direct it between the two courses of the ribbon. Having once started the papers in this manner, they will continue to feed one in front of course E and the other between the two courses of the ribbon so long as desired. If the operator desires to stop duplicating, he preferably severs strip Y at some point between the feed-rolls and the supply-roll, and then sets lever G forward, throwing both guide-plates G and G forward into position to direct the paper, whether one or both strips, forward of the ribbon E.

Of course the paper strip which passes between the two courses of ribbon will be printed upon the back as well as on front, but this will not ordinarily be objectionable.

Figs.4 and 6 show the positions of the paper and ribbon guides when entering two strips of paper for duplicating. Figs. 5 and 7 show the positions after the lever F has been released and the parts have returned to the positions occupied by them while the printing in duplicate is being done. Fig. 8 shows the position of the lever G and guide G when set for operation without duplicating.

While the machine illustrated is specially intended for the production of both an original and a duplicate record of the work done by it, it will be understood that if no duplicate is desired it can be readily and instantly changed so as to produce only an original by throwing lever G to its forward position in which it is automatically looked, as above IIO stated; also, that while I have shown only a single ribbon it will be understood that the ribbon-separatin g devices and the paper-guidin g devices may be used in machines employing two separate ribbons, each passing but once past the printing-center.

The lever F is loosely mounted on the shaft-F but actuates the latter when it is moved forward, as above stated, by reason of the contact of the pin F carried by the shaft, with the projection F carried by the lever. Astop F limits the forward movement of the lever.

I claim--' 1. A duplicating printing device comprising a singleset of type, an ink-ribbon doubled on itself each fold adapted to make an impression on its respective sheet of paper and by the same type, and means for operating the printing mechanism and automatically feeding the paper and inking ribbon.

2. The combination of a paper-feeder for feeding two layers of paper in one direction, a doubled inking ribbon extending transversely to the direction of movement of the paper and along the printing line or center, one strand of the ribbon lying between the said layers of paper and the other strand outside of one of said layers, means for feeding the said strands in opposite directions transversely to the direction of the paper-feed, a set of printing-type acting at said line or center to print duplicate impressions on said paper, and mechanism for causing an impression by said type.

3. The tabulating or type-writing machine having a single ink-ribbon doubled on itself so that two courses of it will be passing the printing-center at the same time, and also provided with means other than the paper being written upon for separating said courses, substantially as specified.

4. The tabulating or other type-writing machine, having two parallel and closely-associated and automatically-operated ribbons passing the printing-center at the same time, and adapted to make direct impressions upon difierent sheets or strips of paper, and also having means other than the paper being written upon for temporarily separating the ribbons to admit one of the paper sheets or itrips between them, substantially. as speci- 5. The tab ulating or other type-writing machine, having two parallel and closely-associated ribbons passing the printing-center at thesame time, and adapted to make direct impressions upon different sheets or strips of paper, and a guide for one of the ribbons, movable so as to carry its ribbon temporarily away from the other ribbon and thus give entrance for the paper between the ribbons, substantially as specified.

6. The tabulatin g or other type-writin g machine, having two parallel and closely-associated ribbons passing the printing-center at the same time, and adapted to make direct impressions upon different sheets or strips of paper, and also having a guiding device F F movable so as to deflect one of the ribbons away from the other and give entrance to the paper between the ribbons, substantially as specified.

.7. The tabulatingorothertype-writingmachine, having two parallel and closely-associated and automatically-operated ribbons bons passing the printing-center at the same time, and'wherein are combined means for supporting and feeding said ribbons, means other than the paper for temporarily separating said ribbons at the printing-center, means for feeding two strips of paper and means for directing one of said strips between the separated ribbons, substantially as specified.

9. The tabulating or other type-writing machine having two parallel and closely-associated ribbons passing the printing-center at the same time, and wherein are combined means for supporting and feeding said ribbons, means for temporarily separating the ribbons at the printingcenter, means for feeding two strips of paper, and guides acting to separate the strips and to direct one strip outside of and the other strip between the rib bons, substantially as specified.

10. The tabulating or other type-writing machine having two parallel and closely-associated ribbons passing the printing-center at the same time, and wherein arecombined' means for supporting and feeding the ribbons, means for temporarily separating the ribbons at the printing-center, means for feeding the paper, movable guides for separating and directing the paper strips so that one moves outside of and the other between the ribbons, and means for controlling said guides, substantially as specified.

11. The tabulating or other type-writing ma= chine having two parallel and closely-associ= ated ribbons passing the printing-center at the same time, and wherein are combined means for supporting and feeding the ribbons, means for temporarily separating the ribbons at the printing-center, means for feeding the paper, movable guides for separating and directing the paper strips so that one moves outside of and the other between the ribbons, and a lever acting both to cause the separation of the ribbons and the positioning of said guides,'substantially as specified.

12. The tabulating or other type-writing machine having two parallel and closely-associated ribbons passing the printing-center at the same time, and wherein are combined means for-supporting and feeding the ribbons,

means for temporarily separating the ribbons at the printing-center, means for feeding the paper, movable guides for separating and directing the paper strips so that one moves outside of and the other between the ribbons, a lever for positioning both said guides in the same position, a pivoted pawl or latch for locking said lever in its acting position, and means for releasing said pawl, substantially as specified.

13. lhe tabulating or other type-writing machine having two parallel and closely-associat-ed ribbons passing the printing-center at the same time, and wherein are combined means for supporting and feeding the ribbons, means for temporarily separating the ribbons at the printing-center, means for feeding the paper, movable guides for separating and directing the paper strips so that one moves outside of and the otherbetween the ribbons, a lever for positioning both said guides in the same position, a pivoted pawl or latch for locking said lever in its acting position, said pawl being releasable by a second lever included in the means for separating the ribbons, substantially as specified.

14. The combination with the paper-guides G and G, of a lever fast upon the shaft carrying said guides, asecond lever attached to the loose guide, and a pawl for locking said lastmentioned lever in one position, said pawl being released by the first-mentioned lever, substantially as specified.

15. The combination of guides G G, the rook-shaft on which they are mounted, the levers F- and G and the pawl-locking lever G and released by lever F, substantially as specified.

DORR E. FELT.

Witnesses:

L. E. CURTIS, H. W. MUNDAY. 

